Improvement in paper sags



ATENT FFICE JAMES B DAVENPORT, OF NEW YORK, N. Y.

IMPROVEMENT 111 PAPER was.

Spooifivafion forming Part of Lotl'ors P:1font N0. %0584l0, dafcd Jnly 9, 1878; application filod April 29, 1878.

f]o all nimm 1't may cmzcern:

Be. it known thag I, JAMES B. DAVENPORT, 0f New York, in ehe county of New York am]. State of New York, l1ave invented certain new and us eful I111prov0m6nts in Bags, Saoks, lloxos, &o. 1nade 0f laper, Pasteboard, &c. of which the following is a specification:

'lhis invention relates to eertain in1prommentsin tl1e nnmufaoture ofbags, saoks, boxes, 211111 ofl1er similar artioles of paper and cardboard; and ir. l1as f0r its obiect to strengthen .fl1e pa-per ab tl1ose parts where t-he creases,

folds; 01 bends of tl1e art-iele oconr, wl1ere the papor or card-board is weakened, 0r wher0 an y spooial'strain 01 wear is likely to t ake place, by 111aki11 g tl1e paper or card-board tl1icker or'of tongher material atsuch parts; and myinvention consists in a.11ew artiele ofmanufaoture 0011- sisting of a bag, saok, o1 box constructed of pa per or oard-board, and l1aving tl1e body of the matorial mado tl1ioker or stronger at;.. tl1e oreases, folds, 01 bends, or the portions subjocted to tl1e greatest wear 0r strain, as more fully l1ereinafer speoified.

I 1 tl1e .drawing, Figure represents a sigle olevation of a bag construoted according to my inve ntion. Iig. 2 represents a perspeetive viow of t]10 san1e. Fig. 3 represents a trans- -verse section of tl1e bag; Fig. 4, a transverse soction of tl1e blank from whioh tl1e bag is foons truoted, and. Ei,g 5 a front view of a portion.of 13110 blank.

Tl10 leltor A .represents tl1e blank 0011- atrnoted, in tl1o present in'stanoe, for the ma11ufaoture ofia paper ba-g. Bald blank maybe formed 011 tl1e ordixiary oylinder paper-nr1achine by n1aki'ng tl1e wire-ganze on 1;l1e cylinder coarser ab specified .parts tl1an ab other parts, so that more pulp will be deposited at t-l1e coarse parts tl1an ab the others. Tlius an extra thiokness of pulpis obtained at parts 'of tl1o sl1e0t 1111d0 at tl1es eoarse arts, as shown will be thicker ab tl1ese points than elsewhere.

I also, if desired, use 011 the cylinder thus deoked a pulp ofa stronger, tongl1er, or different quality from that nsed 011 the other cylinder, giving additional strength to tl1e weak or exposed portions of the finished artiole.

Tl1is combinzttion of pulp, in layers of unequal widch, is pressed and felted in tl1e ordinary manner, am] ol1e blank tl1us produoed is formed 'into a bag, O, or otl1er artiole b y foldin g the paper at the thickened o1 tougl1ened parts B, as shown in Figs. l, 2, and 3, and

pasting am]. ooherwise seouring tl1e edges' of the same in the usual 1nanner.

I1; is evident that the blank may be formed by band, i1 desired, 01 by other de soriptions 0f' paper-making mael1ines.

What I olai1n is As a new artiole of m'anufactnre, abag, sack, o1 box construoted of paper or oardboardandhavingthebodyoftl1ematerialmade thicker'orstronger at the oreases, bends, or

f0lds, orthe portions subject to the greatest yvear 0r strain, substantially as speoified. In testimony that I clai1n the foregoing I have horeunto set my band in ehe presenoe 0f tl1e subseribing witnesses.

JAS. B. DAVENIORT. Witnesses: v

JOHN S. DAVENPORT, WALTER L. COYT. 

